Power BI DAX count rows values distinct column performance alternative to DISTINCTCOUNT measure
The core principle in Power BI Data Analysis Expressions (DAX) is that combining `COUNTROWS` with either the virtual table returned by `VALUES()` or a logical `DISTINCT` flag provides a high-performance alternative to standard distinct counting mechanisms. This mechanism relies on filter-context propagation where unique values are identified and counted without materializing intermediate tables, thereby optimizing computational efficiency over traditional direct distinct count operations in relational data modeling.
Power BI DAX count rows values distinct column performance alternative to DISTINCTCOUNT measure
The core principle in Power BI Data Analysis Expressions (DAX) is that combining `COUNTROWS` with either the virtual table returned by `VALUES()` or a logical `DISTINCT` flag provides a high-performa…